#include "bits/stdc++.h"

using namespace std;
using ll = long long;

const ll MOD = 1000003LL;

ll pow(ll x, ll n) {
    if (n == 0) {
        return 1LL;
    }
    else if (n == 1) {
        return x;
    }
    ll ret = pow(x, n / 2);
    ret *= ret;
    ret %= MOD;
    if (n % 2 == 1) {
        ret *= x;
        ret %= MOD;
    }
    return ret;
}

void Main() {
    ll x, N;
    cin >> x >> N;
    vector<ll> a(N, 0);
    for (int i = 0; i < N; ++i) {
        cin >> a[i];
    }
    ll ans = 0LL;
    for (ll i = 0; i < N; ++i) {
        ans += pow(x, a[i]);
        ans %= MOD;
    }
    cout << ans << endl;
}

int main() {
    std::cout << std::fixed << std::setprecision(15);
    Main();
    return 0;
}